Use
For controlling the room temperature in individual rooms and zones that are
•
heated or cooled with 2-pipe fan coil units
•
cooled with a single compressor in DX type equipment
The controller controls
•
a
3-speed
fan
•
either a valve actuator in a 2-pipe system, or
•
a 1-stage compressor in DX type equipment
Suitable for use in systems with
•
automatic heating / cooling changeover (RDF210)
•
continuous heating or cooling mode (RDF210)
•
manual heating / cooling changeover (RDF2110.2)
Functions
•
Changeover between heating and cooling mode is either automatic by a QAH11.1
changeover cable temperature sensor or manually
•
Maintenance of room temperature either with integrated temperature sensor or ex-
ternal room / return air temperature sensor (only with RDF210)
•
Selection of operating mode with the operating mode button
AUTO
or
on the
controller
•
8 programmable timers for changing over between Normal operation and Energy
Saving mode
•
3-speed fan control (automatic or manual)
•
Output for 2-position (on / off) valve actuator or 1-stage compressor
•
Optional with infrared remote control (only with RDF210…/IR)
Controller
Temperature control
The controller acquires the room temperature via its built-in sensor and maintains the
setpoint by delivering 2-position valve control commands or compressor output com-
mands. With the RDF210, an external room temperature sensor (QAA32) or external
return air temperature sensor (QAH11.1) can be used instead.
The switching differential is 2 K in heating mode and 1 K in cooling mode (adjustable
via parameters P08 and P09).
Display
The display shows the acquired room / return air temperature or the setpoint of the
current operating mode. This can be selected via parameter P18. Factory setting is
display of the current room temperature.
The heating and cooling
symbols on the display show the status of the fan coil.
This means that the symbols are also shown while the controller operates in the neutral
zone.
If required, room temperature and setpoint can also be displayed in °F in place of °C by
changing parameter P17.
2/15
Building Technologies
Room Temperature Controllers
N3058en
HVAC Products
10.01.2006
